pidyon haBen

noun1

1. •
   (Judaism) A ceremony in which a firstborn son is redeemed by a kohen, in order to release him from his obligation from serving in the Temple.

   • The Pidyon Haben applies to the firstborn of the mother only; thus, if one has four or five sons born to him by four or five virgin wives, he is bound to redeem them all. — 1996